[time-nuts] Re: WWVB Daylight savings

[Larry McDavid]

All three WWVB AM clocks I moved into my garage overnight did set to DST 
correctly overnight and I have moved them back into the house.

The house now has radiant thermal barrier thermal insulation under the 
roof in the attic; this insulation has aluminum foil applied to one 
paper surface. When I had this additional insulation installed, the WWVB 
AM clocks throughout the house stopped setting time overnight until I 
moved them to the inside of outside walls; now, they all seem to set 
time but not necessarily the DST change for some reason. The garage does 
not have this insulation so the WWVB signal is stronger out there.

I do wonder why these AM clocks will set time-of-day but not change with 
DST. But, that is always the case; some of the clocks do and some don't 
but it is not always the same clocks that don't. Applying the DST 
correction is just inconsistent.

The new insulation also reduced the GPS signal inside my home 
substantially. I have two timing GPS antennas on the roof and two GPS 
antenna splitters so I can distribute the GPS signal; one supplies GPS 
upstairs and one downstairs. But, if I bring the car GPS navigator 
inside to update its software, it does not consistently get a GPS signal 
now with the new insulation.

The new La Crosse Ultratomic BPSK clocks will set anywhere inside my 
home within 10 minutes (usually much less) any time of day when the 
C-cells are replaced. It is reported that the BPSK "signal strength" 
(actually modulation decoding) is 100 times that of the AM modulation. I 
wish there were more kinds of BPSK clocks available!

Is anyone aware of any other BPSK WWVB clock?

Larry


On 3/14/2021 9:20 PM, David I. Emery wrote:
> On Sun, Mar 14, 2021 at 07:43:03PM -0700, lmcdavid wrote:
> 
>> I have 3 WWVB AM clocks that did not update DST overnight last night
>> but one that did and two BPSK clocks that did. Par for the course. The
>> BPSK clocks always set correctly within 10 minutes any time of day.I
> 
> 	My 4 BPSK clocks updated just exactly as they are supposed
> to - my wife was most amused to watch the process at 2 AM on the one
> in her sewing room/home office.  She actually asked to be woken up
> to see it.
> 
> 	I'm pretty sure the SW in the clock needs only to get a valid
> message about the pending change time some point in advance ... but
> those BPSK clocks work well in the Boston suburbs, which is not exactly
> strong WWVB 60 KHz territory... though they are in a wood frame house and a
> brick hospital office... not particularly magnetically shielded either
> place.
> 
> 
> 
> 
> 
> 
> 
>> -------- Original message --------From: lstoskopf at cox.net Date: 3/14/21  7:23 PM  (GMT-08:00) To: time-nuts at lists.febo.com Subject: [time-nuts] WWVB Daylight savings Strange, here in KS one of my 60 kHz clocks didn't update.?? I'll give it a few days and not blame the update.?? N0UU_______________________________________________time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe send an email to time-nuts-leave at lists.febo.comTo unsubscribe, go to and follow the instructions there.
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-- 
Best wishes,

Larry McDavid W6FUB
Anaheim, California  (SE of Los Angeles, near Disneyland)